Isoetes andina Spruce ex Hook.

URI: http://eol.org/schema/terms/sporeArrangement
Definition: The important feature of homospory is the four fold division involved in spore production, this takes the form of either a tetrahedra which gives a trilete (Y shaped scar) spore or a tetragon which gives a monolete (single linear scar) spore.
Attribution: https://www.ucl.ac.uk/GeolSci/micropal/spore.html

Isoetes andina is a species of plants in the family Isoetaceae.

EOL has data for 2 attributes, including:

Known occurrences, collected specimens and observations of Isoetes andina Spruce ex Hook.. View this species on GBIF